Shock-absorber.



C. P. PIHLBLAD.

SHOCK ABSORBER.

APPLICATION FILED JULY 2, 1913.

1,123,794 Patented m. 5, 1915'.

wmm C/zafkJEPZ/zZM F, BIHLB LAD, OF JERSEY. CITY, NEW JERSEY.

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Specification of fietters Patent.

Patented'Jan.5,1915.

, Application filed July 2, 1913. Serial No. 777,078.

To all whom it ma concern.

Be it known t at 1, CHARLES F. Prun- BLAD, a citizen of the UnitedStates, residing at Jersey City, in thecounty of Hudson and State of NewJersey, have invented new and useful Improvements in Shock- Absorbers,of which the following is a specification.

The object-of='this-invention isto rovide a device for the revention.of'sud en and disagreeable shoc such as are due to the sudden or abruptcompression of the springs of automobiles and other vehicles, and toprovide a device of this character which shall absorb such shockswithout impairing the effectiveness' of. the vehicle sprin s.

The device of this invention may e used in any connection where thereare two parts having relative movement toward and from each other,and'in which it is desirable to absorb the shock resulting from thesudden character of such relative movement, and the invention is not tobe limited to use in an particular vehicle or machine.

The nature of the invention will appear more fully from the accompanyingdescription and drawings, and will be particular y pointed out in theappended claim.

The drawings illustrate the preferred form 'of device embodying theinvention, wherein, a

Figure 1 is a side elevation of the device in use. Fig. 2 is an enlargeddetail side ele vation of the invention. Fig. 3' is a detail endelevation with a part broken away to disclose the means for locking thesections of one part of the device.

For the purpose of illustration I have elected to show my device as itwill appear when used in connection with the two parts of a vehiclewhich move relativel I toward and from each other when the wheels rollover uneven ground. These parts are herein shown as the chassis 5 andthe springs 6.

The device forming the subject matter of thepresent invention and hereinindicated generally by (1, comprises a member b and a .member a fittedrespectively to the chassis and spring and adapted when arranged tocooperate one with the other,-t0 oller resistance to the action of thespring and chassis when these parts move relatively toward each other.The part 0 comprises a base late Tsuitably fastened to the spring 6 as ythe. clevises 8-8, draw bars 9-9 arranged to slide in holders or guides10l0 the sliding. movement of the draw bars in:

one direction. Heads 12-l2 forming theii inner ends of the draw bars 99forth abut ments for the inner ends of the springs l1-1l whose outerends bear on the end guides 1010. These heads also carry rolls l3.13which are arranged so as to have portions of their peripheriesprojecting beyond the inner ends of the heads 1212. When the partsoccupy their normal positions as shown in F ig. 2, projectin portions ofthe rolls 13.13 are in mutu l contact and are so held by the springsl111 which are then under slight tension.

The part b is suitably secured as by bolts 14, to the chassis 5. Thispart b has its free end directed between the rolls 1313 and islongitudinally extensible, whereby to compensate for the variations indistance which usually exists between the chassis and middle portions ofsprings in vehicles of dilferent types or makes. The part b is made upof the u per section 15 and the lower section 16. he said u per section15 has outwardly extending ii which'function as stays for the lowersection 16 arranged therebet'ween. The opposed bearing faces of thesections 15 and 16 areserrated as indicated by 18 in Fig. 3, whereby, toobtain an interlocking effect against longitudinal movement of thesections when the bearing surfaces are arranged one upon the other asshown in the drawings. Suitable locking devices such as bolts and nut-s19, are employed for clamping the sections together as shown in Fig. 3.The'bolts pass through a longitudinal slot '20 in the lower section 16and the presence of this slot renders as unnecessary the completewithdrawal of the bolts from the sections when adjusting the member I)to the size required by the distance between the rolls 1313 and/thechassis 5 when the sections 6 and c are arranged as shown in Figs.

the part of i he draw bars has the effect.. of

gradually increasing the tension of "thee springs 11-11 and since theaction on the chassis and spring resulting from the wheel receiving asudden jar, it is manifest that this eompressionof the springs 11-.-- 11will absorb the shock or 'jar obtained by the wheel. I

What-is claimed as new is:

A shock absorber com rising a base plate adapted tobe positionei upon,the intermediate portion of a spring, guidesprovided upon tIi'eLbaSepIate, resiliently held bars slidably mounted in the guides and held inpresence of twowitne'sses.

therein against turnin movement, rolls ournaled -at the inner endsof thebars, and a longitudinally extensible member mounted for movement in adirection tranSYerselypf the base plate and in a line between the innerends of the bars said member having a. tapered end which is engageablewith the rolls, the intermediate portion of the base plate being locatedin of said memberi the path ofmovem'ent In testimony whereof I afiix mysignature GHARLES Witnesses? Geo. A. BYRNE,

,PIHL LAD.

